springmvc小案例二

摘要: 类型转换器

添加页面------------------------------

<form action="${pageContext.request.contextPath }/empAction.action" method="post">
<table border="2" align="center">
<tr>
<th>姓名</th>
<td><input type="text" name="name"/></td>
</tr>
<tr>
<th>性别</th>
<td>
<input type="radio" name="sex" value="男"/>男
<input type="radio" name="sex" value="女"/>女
</td>
</tr>
<tr>
<th>入职时间</th>
<td><input type="text" name="date" value="2016-05-14"/></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="提交"/></td>
</tr>
</table>
</form>

-----------------------springmvc配置文件---------------------------

<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"

xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd

">

<bean name="/empAction.action" class="cn.gdpe.emp.EmpAction"></bean>

<!-- 专用于jsp到jsp/html的转发控制器 -->
<bean name="/testJsp.action" class="org.springframework.web.servlet.mvc.ParameterizableViewController">
<!-- 转发到真实视图名 -->
<property name="viewName" value="/forwardTestJsp.jsp"/>
</bean>

<!-- 注册Action
class代表处理类的全路径
name表示请求路径
-->

<bean id="userActionId" class="cn.gdpe.springmvc.UserAction"></bean>

<!-- 映射器
表示将bean标签的name属性当做URL请求
可选

<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>-->

<!--SimpleUrlHandlerMapping将多个请求映射到同一个Action

-->
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/add.action">userActionId</prop>
<prop key="/delete.action">userActionId</prop>
<prop key="/update.action">userActionId</prop>
<prop key="/select.action">userActionId</prop>
</props>
</property>
</bean>

<!-- 适配器
表示用于寻找实现了controller接口的action类
可选
-->
<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>

<!-- 视图器
表示用于匹配modelAndView.setViewName("/springMvcFirst.jsp");中封装的路径
可选
-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/userjsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>

--------------------------web.xml文件---------------------------

<filter>
<filter-name>characterEncoding</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>

-------------------------------action类----------------------------------

public class EmpAction extends AbstractCommandController {
public EmpAction(){
this.setCommandClass(Emp.class);
System.out.println("EmpAction()构造器");
}
/*如果不用注解的方式 继承AbstractCommandController 可以直接得到实体对象，并且为你封装好了数据 this.setCommandClass(Emp.class);这句代码 必须在构造器*/

/*
* object-->封装的实体类
* bindException-->封装错误
*/
@Override
protected ModelAndView handle(HttpServletRequest request,
HttpServletResponse response, Object object, BindException bindException)
throws Exception {
ModelAndView modelAndView=new ModelAndView();
request.setAttribute("message", "增加员工");
System.out.println("handle()方法");
Emp emp=(Emp) object;
request.setAttribute("emp", emp);
modelAndView.setViewName("/successAdd.jsp");
return modelAndView;
}
/*
* 自定义类型转换器
*/

@Override
protected void initBinder(HttpServletRequest request,
ServletRequestDataBinder binder) throws Exception {
//参数一：将String类型转换为什么类型---》目标类型
//参数二：自定义转换规则
binder.registerCustomEditor(Date.class,
new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"), true));
}

-----------------------实体类------------------------

import java.util.Date;

public class Emp {
public String name;
public String sex;
public Date date;
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
@Override
public String toString() {
return "Emp [name=" + name + ", sex=" + sex + ", date=" + date.toLocaleString() + "]";
}

}

-----------------转向页面----------------------

<body>
${message }
${requestScope.emp.name }
${requestScope.emp.sex }
<fmt:formatDate value="${requestScope.emp.date }" type="date" dateStyle="default"/>
</body>